/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieSceneTimeWarping.h
Transforms the given range by time-warping its lower bound, and computing an upper bound so that the size of the input range is preserved. So if the input range starts in the middle of a loop and lasts 3 loops, the output range will start in the middle of the first loop, and last 3 times as long as the Length of this time warp.
[TRange](API\Runtime\Core\Math\TRange)< [FFrameTime](API\Runtime\Core\Misc\FFrameTime) > TransformRangeUnwarped ( const [TRange](API\Runtime\Core\Math\TRange)< [FFrameTime](API\Runtime\Core\Misc\FFrameTime) > & Range ) const